GIMP Tutorials not accessible

Hello!
I am new here on the forum and a beginner on using GIMP (or any other image editing software).
Why is it that when I press the "GIMP Tutorials" icon on the upper right corner I get this message : "403 Error - Forbidden"?
I suppose the tutorials on the forum are the same to those on the GIMP webpage or they are not?
Thank you.